$ git clone -n https://src.fedoraproject.org/rpms/ghc-koji.git /var/lib/mock/f39-build-1918616-42935/root/chroot_tmpdir/scmroot/ghc-koji
Cloning into '/var/lib/mock/f39-build-1918616-42935/root/chroot_tmpdir/scmroot/ghc-koji'...
$ git fetch origin 027925f721e32a659ed19262e7565ad5dbd684c7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-koji
 * [new ref]         027925f721e32a659ed19262e7565ad5dbd684c7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 027925f bump release