$ git clone -n https://src.fedoraproject.org/rpms/golang-modernc-xc.git /var/lib/mock/f45-build-12743-443/root/chroot_tmpdir/scmroot/golang-modernc-xc
Cloning into '/var/lib/mock/f45-build-12743-443/root/chroot_tmpdir/scmroot/golang-modernc-xc'...
$ git fetch origin 6033fedaf0e9baf2fe8aa3052543ccb17a02f352:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-modernc-xc
 * [new ref]         6033fedaf0e9baf2fe8aa3052543ccb17a02f352 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6033fed Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild