$ git clone -n https://src.fedoraproject.org/rpms/libgdamm.git /var/lib/mock/f45-build-16209-483/root/chroot_tmpdir/scmroot/libgdamm
Cloning into '/var/lib/mock/f45-build-16209-483/root/chroot_tmpdir/scmroot/libgdamm'...
$ git fetch origin df7826b51ce7d3eb07a52529bbbffe738633fe6a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libgdamm
 * [new ref]         df7826b51ce7d3eb07a52529bbbffe738633fe6a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at df7826b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild