$ git clone -n https://src.fedoraproject.org/rpms/trojita.git /var/lib/mock/f38-build-717810-96592/root/chroot_tmpdir/scmroot/trojita
Cloning into '/var/lib/mock/f38-build-717810-96592/root/chroot_tmpdir/scmroot/trojita'...
$ git fetch origin 5db5498b897786684be394fbab8827320a0ce87a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/trojita
 * [new ref]         5db5498b897786684be394fbab8827320a0ce87a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5db5498 Fix sources file