$ git clone -n https://src.fedoraproject.org/rpms/rss-glx.git /var/lib/mock/f45-build-34688-690/root/chroot_tmpdir/scmroot/rss-glx
Cloning into '/var/lib/mock/f45-build-34688-690/root/chroot_tmpdir/scmroot/rss-glx'...
$ git fetch origin 5acaeeac3056f80ea27dc02aaec776b4995abfcf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rss-glx
 * [new ref]         5acaeeac3056f80ea27dc02aaec776b4995abfcf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5acaeea Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild