$ git clone -n https://src.fedoraproject.org/rpms/golang-modernc-cc-3.git /var/lib/mock/f45-build-12679-443/root/chroot_tmpdir/scmroot/golang-modernc-cc-3
Cloning into '/var/lib/mock/f45-build-12679-443/root/chroot_tmpdir/scmroot/golang-modernc-cc-3'...
$ git fetch origin c01c3539bb9e9000d12abecfd9ab189cc51df06d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-modernc-cc-3
 * [new ref]         c01c3539bb9e9000d12abecfd9ab189cc51df06d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c01c353 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild