$ git clone -n https://src.fedoraproject.org/forks/hypersa/rpms/ghc-time-manager.git /var/lib/mock/f39-build-2218312-52600/root/chroot_tmpdir/scmroot/ghc-time-manager
Cloning into '/var/lib/mock/f39-build-2218312-52600/root/chroot_tmpdir/scmroot/ghc-time-manager'...
$ git fetch origin 8907ea19ce77e38ead598e14c9882fddfbcb1f67:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/hypersa/rpms/ghc-time-manager
 * [new ref]         8907ea19ce77e38ead598e14c9882fddfbcb1f67 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8907ea1 rv64 rebuild