$ git clone -n https://src.fedoraproject.org/rpms/ghc-email-validate.git /var/lib/mock/f38-build-side-42-init-devel-955153-28786/root/chroot_tmpdir/scmroot/ghc-email-validate
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-955153-28786/root/chroot_tmpdir/scmroot/ghc-email-validate'...
$ git fetch origin ec51fdbbe39aea5b295cc84cc170b1603a21a3c8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-email-validate
 * [new ref]         ec51fdbbe39aea5b295cc84cc170b1603a21a3c8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec51fdb Convert to %autorelease and %autochangelog