$ git clone -n https://src.fedoraproject.org/rpms/libart_lgpl.git /var/lib/mock/f45-build-15836-480/root/chroot_tmpdir/scmroot/libart_lgpl
Cloning into '/var/lib/mock/f45-build-15836-480/root/chroot_tmpdir/scmroot/libart_lgpl'...
$ git fetch origin 7da1474e2367ca9fcbcb754d92449915edd56841:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libart_lgpl
 * [new ref]         7da1474e2367ca9fcbcb754d92449915edd56841 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7da1474 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild