$ git clone -n https://src.fedoraproject.org/rpms/urlwatch.git /var/lib/mock/f45-build-37758-717/root/chroot_tmpdir/scmroot/urlwatch
Cloning into '/var/lib/mock/f45-build-37758-717/root/chroot_tmpdir/scmroot/urlwatch'...
$ git fetch origin 83c35971eca94ce8fd2460444bea1ca27ab7c43b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/urlwatch
 * [new ref]         83c35971eca94ce8fd2460444bea1ca27ab7c43b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 83c3597 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild