$ git clone -n https://src.fedoraproject.org/rpms/git-tools.git /var/lib/mock/f45-build-11091-427/root/chroot_tmpdir/scmroot/git-tools
Cloning into '/var/lib/mock/f45-build-11091-427/root/chroot_tmpdir/scmroot/git-tools'...
$ git fetch origin 82de2253757147bfae71d7b8ca55747ee9e910b6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/git-tools
 * [new ref]         82de2253757147bfae71d7b8ca55747ee9e910b6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 82de225 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild