$ git clone -n https://src.fedoraproject.org/rpms/borgbackup.git /var/lib/mock/f41-build-813474-148684/root/chroot_tmpdir/scmroot/borgbackup
Cloning into '/var/lib/mock/f41-build-813474-148684/root/chroot_tmpdir/scmroot/borgbackup'...
$ git fetch origin cb1e1949583994a8f9c8f37d1b58d44624dbde01:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/borgbackup
 * [new ref]         cb1e1949583994a8f9c8f37d1b58d44624dbde01 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cb1e194 update to 1.4.0