$ git clone -n https://src.fedoraproject.org/rpms/clevis.git /var/lib/mock/f38-build-side-42-init-devel-640690-26389/root/chroot_tmpdir/scmroot/clevis
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-640690-26389/root/chroot_tmpdir/scmroot/clevis'...
$ git fetch origin b26827cd466c545b5336aac6f558bb94c5dd400b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/clevis
 * [new ref]         b26827cd466c545b5336aac6f558bb94c5dd400b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b26827c Include LUKSv2 volumes in description