$ git clone -n https://src.fedoraproject.org/rpms/gti.git /var/lib/mock/f45-build-13140-446/root/chroot_tmpdir/scmroot/gti
Cloning into '/var/lib/mock/f45-build-13140-446/root/chroot_tmpdir/scmroot/gti'...
$ git fetch origin 47ecccbd901fbeda9feea188d8441a597b2b0fc0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gti
 * [new ref]         47ecccbd901fbeda9feea188d8441a597b2b0fc0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 47ecccb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild