$ git clone -n https://src.fedoraproject.org/rpms/shdoc.git /var/lib/mock/f45-build-35907-700/root/chroot_tmpdir/scmroot/shdoc
Cloning into '/var/lib/mock/f45-build-35907-700/root/chroot_tmpdir/scmroot/shdoc'...
$ git fetch origin 7ed8a66e595d7bc5477d717208b6e10040f97641:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/shdoc
 * [new ref]         7ed8a66e595d7bc5477d717208b6e10040f97641 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7ed8a66 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild