$ git clone -n https://src.fedoraproject.org/rpms/vim.git /var/lib/mock/f41-build-861293-169597/root/chroot_tmpdir/scmroot/vim
Cloning into '/var/lib/mock/f41-build-861293-169597/root/chroot_tmpdir/scmroot/vim'...
$ git fetch origin 9eb44931632082f2873d99735b28745326a6d133:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vim
 * [new ref]           9eb44931632082f2873d99735b28745326a6d133 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9eb44931 - patchlevel 866