$ git clone -n https://src.fedoraproject.org/rpms/acpitool.git /var/lib/mock/f41-build-903215-17004/root/chroot_tmpdir/scmroot/acpitool
Cloning into '/var/lib/mock/f41-build-903215-17004/root/chroot_tmpdir/scmroot/acpitool'...
$ git fetch origin eb5e9f80e9e6b40d439534acb92cb9625af20863:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/acpitool
 * [new ref]         eb5e9f80e9e6b40d439534acb92cb9625af20863 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eb5e9f8 Eliminate use of obsolete %patchN syntax (#2283636)