$ git clone -n https://src.fedoraproject.org/rpms/ghc-mime-types.git /var/lib/mock/f40-build-742208-110610/root/chroot_tmpdir/scmroot/ghc-mime-types
Cloning into '/var/lib/mock/f40-build-742208-110610/root/chroot_tmpdir/scmroot/ghc-mime-types'...
$ git fetch origin 8c6e69de2d0aaeb7cf73794285e4f718e615df0d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-mime-types
 * [new ref]         8c6e69de2d0aaeb7cf73794285e4f718e615df0d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c6e69d https://hackage.haskell.org/package/mime-types-0.1.1.0/changelog