$ git clone -n https://src.fedoraproject.org/rpms/testdisk.git /var/lib/mock/f41-build-side-1-2670564-29059/root/chroot_tmpdir/scmroot/testdisk
Cloning into '/var/lib/mock/f41-build-side-1-2670564-29059/root/chroot_tmpdir/scmroot/testdisk'...
$ git fetch origin 15cf0dfb87611abff2cb1ba1c2b61eac7ff9adf7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/testdisk
 * [new ref]         15cf0dfb87611abff2cb1ba1c2b61eac7ff9adf7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 15cf0df convert GPLv2+ license to SPDX