$ git clone -n https://src.fedoraproject.org/rpms/python-xlib.git /var/lib/mock/f45-build-33744-674/root/chroot_tmpdir/scmroot/python-xlib
Cloning into '/var/lib/mock/f45-build-33744-674/root/chroot_tmpdir/scmroot/python-xlib'...
$ git fetch origin 2ee9e19c75ad8eafc0481c7b1341682c6e2073f1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-xlib
 * [new ref]         2ee9e19c75ad8eafc0481c7b1341682c6e2073f1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2ee9e19 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild