$ git clone -n https://src.fedoraproject.org/rpms/maatkit.git /var/lib/mock/f45-build-17895-505/root/chroot_tmpdir/scmroot/maatkit
Cloning into '/var/lib/mock/f45-build-17895-505/root/chroot_tmpdir/scmroot/maatkit'...
$ git fetch origin ad49c76b7f08eea52ada1e7bea00e9334dd8c5ad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maatkit
 * [new ref]         ad49c76b7f08eea52ada1e7bea00e9334dd8c5ad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ad49c76 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild