$ git clone -n https://src.fedoraproject.org/rpms/trojan.git /var/lib/mock/f45-build-37502-715/root/chroot_tmpdir/scmroot/trojan
Cloning into '/var/lib/mock/f45-build-37502-715/root/chroot_tmpdir/scmroot/trojan'...
$ git fetch origin 0fae63fa3bee0372af94e3113d289821e656f44a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/trojan
 * [new ref]         0fae63fa3bee0372af94e3113d289821e656f44a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0fae63f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild