$ git clone -n https://src.fedoraproject.org/rpms/ghc-blaze-textual.git /var/lib/mock/f38-build-side-42-init-devel-975111-28922/root/chroot_tmpdir/scmroot/ghc-blaze-textual
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-975111-28922/root/chroot_tmpdir/scmroot/ghc-blaze-textual'...
$ git fetch origin 185131732871fbe991d86154e608016feb93d003:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-blaze-textual
 * [new ref]         185131732871fbe991d86154e608016feb93d003 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1851317 Convert to %autorelease and %autochangelog