$ git clone -n https://src.fedoraproject.org/rpms/ghc-clock.git /var/lib/mock/f38-build-side-42-init-devel-950984-28780/root/chroot_tmpdir/scmroot/ghc-clock
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-950984-28780/root/chroot_tmpdir/scmroot/ghc-clock'...
$ git fetch origin 6467d4122371308d1c3db15d1746339cc9e5d156:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-clock
 * [new ref]         6467d4122371308d1c3db15d1746339cc9e5d156 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6467d41 Convert to %autorelease and %autochangelog