$ git clone -n https://src.fedoraproject.org/rpms/lazarus.git /var/lib/mock/f41-build-833442-157867/root/chroot_tmpdir/scmroot/lazarus
Cloning into '/var/lib/mock/f41-build-833442-157867/root/chroot_tmpdir/scmroot/lazarus'...
$ git fetch origin 0f14c0226021662cf1cbdd8d5c9d13bd1fa90bf1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lazarus
 * [new ref]         0f14c0226021662cf1cbdd8d5c9d13bd1fa90bf1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0f14c02 Update to v3.4