$ git clone -n https://src.fedoraproject.org/rpms/ghc-Decimal.git /var/lib/mock/f38-build-side-42-init-devel-962862-28791/root/chroot_tmpdir/scmroot/ghc-Decimal
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-962862-28791/root/chroot_tmpdir/scmroot/ghc-Decimal'...
$ git fetch origin 64054e3839093bcebaf9bc0eb77d52645ba7fb90:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-Decimal
 * [new ref]         64054e3839093bcebaf9bc0eb77d52645ba7fb90 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 64054e3 Convert to %autorelease and %autochangelog