$ git clone -n https://src.fedoraproject.org/rpms/python-urlgrabber.git /var/lib/mock/f45-build-33520-670/root/chroot_tmpdir/scmroot/python-urlgrabber
Cloning into '/var/lib/mock/f45-build-33520-670/root/chroot_tmpdir/scmroot/python-urlgrabber'...
$ git fetch origin eec81b70cf43bc2cf1f60dba23b60d8cd6e2125d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-urlgrabber
 * [new ref]         eec81b70cf43bc2cf1f60dba23b60d8cd6e2125d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eec81b7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild