$ git clone -n https://src.fedoraproject.org/rpms/ghc-SafeSemaphore.git /var/lib/mock/f41-build-838871-159867/root/chroot_tmpdir/scmroot/ghc-SafeSemaphore
Cloning into '/var/lib/mock/f41-build-838871-159867/root/chroot_tmpdir/scmroot/ghc-SafeSemaphore'...
$ git fetch origin 36b7c85a7151486985a0e4523395b36ff4f5305b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-SafeSemaphore
 * [new ref]         36b7c85a7151486985a0e4523395b36ff4f5305b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 36b7c85 bump release