$ git clone -n https://src.fedoraproject.org/rpms/guestfs-tools.git /var/lib/mock/f39-build-2370673-60389/root/chroot_tmpdir/scmroot/guestfs-tools
Cloning into '/var/lib/mock/f39-build-2370673-60389/root/chroot_tmpdir/scmroot/guestfs-tools'...
$ git fetch origin 11a9afa00260d1012f798eb76ec9b37941ee11b6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/guestfs-tools
 * [new ref]         11a9afa00260d1012f798eb76ec9b37941ee11b6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 11a9afa Fix virt-customize --chown invalid format error