$ git clone -n https://src.fedoraproject.org/rpms/libcacard.git /var/lib/mock/f41-build-1045136-19054/root/chroot_tmpdir/scmroot/libcacard
Cloning into '/var/lib/mock/f41-build-1045136-19054/root/chroot_tmpdir/scmroot/libcacard'...
$ git fetch origin d112a238608d030980eed48d6a60c1900bd604e6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libcacard
 * [new ref]         d112a238608d030980eed48d6a60c1900bd604e6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d112a23 Eliminate use of obsolete %patchN syntax (#2283636)