$ git clone -n https://src.fedoraproject.org/rpms/sailcut.git /var/lib/mock/f45-build-35566-696/root/chroot_tmpdir/scmroot/sailcut
Cloning into '/var/lib/mock/f45-build-35566-696/root/chroot_tmpdir/scmroot/sailcut'...
$ git fetch origin 3c97eba0417d18de6c7afc18b726d22f4e703e7c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sailcut
 * [new ref]         3c97eba0417d18de6c7afc18b726d22f4e703e7c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3c97eba Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild