$ git clone -n https://src.fedoraproject.org/rpms/compsize.git /var/lib/mock/f41-build-side-1-3125342-39494/root/chroot_tmpdir/scmroot/compsize
Cloning into '/var/lib/mock/f41-build-side-1-3125342-39494/root/chroot_tmpdir/scmroot/compsize'...
$ git fetch origin 6c24c87cf847c08ca09169d89947caf2a670e853:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/compsize
 * [new ref]         6c24c87cf847c08ca09169d89947caf2a670e853 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6c24c87 convert GPLv2+ license to SPDX