$ git clone -n https://src.fedoraproject.org/rpms/ghc-regex-base.git /var/lib/mock/f31-build-112257-34273/root/chroot_tmpdir/scmroot/ghc-regex-base
Cloning into '/var/lib/mock/f31-build-112257-34273/root/chroot_tmpdir/scmroot/ghc-regex-base'...
$ git reset --hard 563a3a634b9034539daa8c18b8196b08e843e261
HEAD is now at 563a3a6 BR prof for lib and static for executable