$ git clone -n https://src.fedoraproject.org/rpms/vorbisgain.git /var/lib/mock/f45-build-38178-722/root/chroot_tmpdir/scmroot/vorbisgain
Cloning into '/var/lib/mock/f45-build-38178-722/root/chroot_tmpdir/scmroot/vorbisgain'...
$ git fetch origin 4158c2b5b5a478ae24884b9a6d7a6fa0a40ee0c3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vorbisgain
 * [new ref]         4158c2b5b5a478ae24884b9a6d7a6fa0a40ee0c3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4158c2b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild