$ git clone -n https://src.fedoraproject.org/rpms/firejail.git /var/lib/mock/f42-build-side-1-3498233-45962/root/chroot_tmpdir/scmroot/firejail
Cloning into '/var/lib/mock/f42-build-side-1-3498233-45962/root/chroot_tmpdir/scmroot/firejail'...
$ git fetch origin 6a5f927b364a37087f3099c529074a9795081b50:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/firejail
 * [new ref]         6a5f927b364a37087f3099c529074a9795081b50 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a5f927 Update to v0.9.74