$ git clone -n https://src.fedoraproject.org/rpms/ghc-SafeSemaphore.git /var/lib/mock/f31-build-93449-32407/root/chroot_tmpdir/scmroot/ghc-SafeSemaphore
Cloning into '/var/lib/mock/f31-build-93449-32407/root/chroot_tmpdir/scmroot/ghc-SafeSemaphore'...
$ git reset --hard 2ec4ab59ca6e122f05bbf0078b9973d9f8503361
HEAD is now at 2ec4ab5 BR prof for lib and static for executable