$ git clone -n https://src.fedoraproject.org/rpms/ghc-sendfile.git /var/lib/mock/f39-build-1715215-41229/root/chroot_tmpdir/scmroot/ghc-sendfile
Cloning into '/var/lib/mock/f39-build-1715215-41229/root/chroot_tmpdir/scmroot/ghc-sendfile'...
$ git fetch origin 916f300d7a60cd3b8d0000957255cfb583da33ad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-sendfile
 * [new ref]         916f300d7a60cd3b8d0000957255cfb583da33ad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 916f300 bump release