$ git clone -n https://src.fedoraproject.org/rpms/golang-github-tinylib-msgp.git /var/lib/mock/f45-build-20255-569/root/chroot_tmpdir/scmroot/golang-github-tinylib-msgp
Cloning into '/var/lib/mock/f45-build-20255-569/root/chroot_tmpdir/scmroot/golang-github-tinylib-msgp'...
$ git fetch origin 5f3e296adb62a74a4046ed422fbf1c402feb138d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-tinylib-msgp
 * [new ref]         5f3e296adb62a74a4046ed422fbf1c402feb138d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5f3e296 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild