$ git clone -n https://src.fedoraproject.org/rpms/snapd-glib.git /var/lib/mock/f40-build-790776-136819/root/chroot_tmpdir/scmroot/snapd-glib
Cloning into '/var/lib/mock/f40-build-790776-136819/root/chroot_tmpdir/scmroot/snapd-glib'...
$ git fetch origin 8e156ef9301026b9a1a79519159acc769d0410b1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/snapd-glib
 * [new ref]         8e156ef9301026b9a1a79519159acc769d0410b1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8e156ef Rebase to 1.64