$ git clone -n https://src.fedoraproject.org/rpms/nomarch.git /var/lib/mock/f45-build-19755-555/root/chroot_tmpdir/scmroot/nomarch
Cloning into '/var/lib/mock/f45-build-19755-555/root/chroot_tmpdir/scmroot/nomarch'...
$ git fetch origin e0bfd5cac78bbc62a628c4509e2376df1bb06197:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nomarch
 * [new ref]         e0bfd5cac78bbc62a628c4509e2376df1bb06197 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e0bfd5c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild