$ git clone -n https://src.fedoraproject.org/rpms/python-mrcfile.git /var/lib/mock/f40-build-2027655-47321/root/chroot_tmpdir/scmroot/python-mrcfile
Cloning into '/var/lib/mock/f40-build-2027655-47321/root/chroot_tmpdir/scmroot/python-mrcfile'...
$ git fetch origin d46c3a7dda81b193924b31c9381e752c43cdbc1f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-mrcfile
 * [new ref]         d46c3a7dda81b193924b31c9381e752c43cdbc1f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d46c3a7 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild