$ git clone -n https://src.fedoraproject.org/rpms/cockpit-image-builder.git /var/lib/mock/f45-build-4539-332/root/chroot_tmpdir/scmroot/cockpit-image-builder
Cloning into '/var/lib/mock/f45-build-4539-332/root/chroot_tmpdir/scmroot/cockpit-image-builder'...
$ git fetch origin 3a605f17b25abcd5d643ae06f5bb91b18488f5a7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cockpit-image-builder
 * [new ref]         3a605f17b25abcd5d643ae06f5bb91b18488f5a7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3a605f1 Update to 106 upstream release