$ git clone -n https://src.fedoraproject.org/rpms/golang-uber-ratelimit.git /var/lib/mock/f45-build-12799-443/root/chroot_tmpdir/scmroot/golang-uber-ratelimit
Cloning into '/var/lib/mock/f45-build-12799-443/root/chroot_tmpdir/scmroot/golang-uber-ratelimit'...
$ git fetch origin 6c7f5610e406374f72d4b0533684e11f2d172d06:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-uber-ratelimit
 * [new ref]         6c7f5610e406374f72d4b0533684e11f2d172d06 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6c7f561 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild