$ git clone -n https://src.fedoraproject.org/rpms/qmmp.git /var/lib/mock/f45-build-33963-675/root/chroot_tmpdir/scmroot/qmmp
Cloning into '/var/lib/mock/f45-build-33963-675/root/chroot_tmpdir/scmroot/qmmp'...
$ git fetch origin 0a047cff0686aa9ff2e253b0aaea589d4604de27:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qmmp
 * [new ref]         0a047cff0686aa9ff2e253b0aaea589d4604de27 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0a047cf Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild