$ git clone -n https://src.fedoraproject.org/rpms/golang-github-containerd-btrfs.git /var/lib/mock/f41-build-side-1-3135294-39767/root/chroot_tmpdir/scmroot/golang-github-containerd-btrfs
Cloning into '/var/lib/mock/f41-build-side-1-3135294-39767/root/chroot_tmpdir/scmroot/golang-github-containerd-btrfs'...
$ git fetch origin 062a2202c5303d500350036e448db271c5d39b7a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-containerd-btrfs
 * [new ref]         062a2202c5303d500350036e448db271c5d39b7a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 062a220 convert ASL 2.0 license to SPDX