$ git clone -n https://src.fedoraproject.org/rpms/svxlink.git /var/lib/mock/f41-build-side-1-2949535-35473/root/chroot_tmpdir/scmroot/svxlink
Cloning into '/var/lib/mock/f41-build-side-1-2949535-35473/root/chroot_tmpdir/scmroot/svxlink'...
$ git fetch origin b1262d8442d4be2732367ed6d652f5b661216aaa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/svxlink
 * [new ref]         b1262d8442d4be2732367ed6d652f5b661216aaa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b1262d8 convert GPLv2+ license to SPDX