$ git clone -n https://git.cclinux.org/stage/rpms/ghc-stm.git /var/lib/mock/dist-circle8-build-17060-3308/root/chroot_tmpdir/scmroot/ghc-stm
Cloning into '/var/lib/mock/dist-circle8-build-17060-3308/root/chroot_tmpdir/scmroot/ghc-stm'...
$ git reset --hard ef31c9a994263490df2421839e1bf410b2b2a4a0
HEAD is now at ef31c9a import ghc-stm-2.4.4.1-5.el8