$ git clone -n https://src.fedoraproject.org/rpms/kommit.git /var/lib/mock/f41-build-side-1-2878824-34446/root/chroot_tmpdir/scmroot/kommit
Cloning into '/var/lib/mock/f41-build-side-1-2878824-34446/root/chroot_tmpdir/scmroot/kommit'...
$ git fetch origin 8db07e93d84be629049d94b32ba2240842021e2f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kommit
 * [new ref]         8db07e93d84be629049d94b32ba2240842021e2f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8db07e9 Rebuild for libgit2 1.8.x