$ git clone -n https://src.fedoraproject.org/rpms/ghc-safe.git /var/lib/mock/f38-build-side-42-init-devel-875843-28452/root/chroot_tmpdir/scmroot/ghc-safe
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-875843-28452/root/chroot_tmpdir/scmroot/ghc-safe'...
$ git fetch origin 6b5b162fedd944f7acf05de8bc34c98378d95b62:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-safe
 * [new ref]         6b5b162fedd944f7acf05de8bc34c98378d95b62 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6b5b162 Convert to %autorelease and %autochangelog