$ git clone -n https://src.fedoraproject.org/rpms/gtimelog.git /var/lib/mock/f45-build-13139-446/root/chroot_tmpdir/scmroot/gtimelog
Cloning into '/var/lib/mock/f45-build-13139-446/root/chroot_tmpdir/scmroot/gtimelog'...
$ git fetch origin 1131b1e93ff21373203981ebb48d7c623ecd486c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gtimelog
 * [new ref]         1131b1e93ff21373203981ebb48d7c623ecd486c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1131b1e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild