$ git clone -n https://src.fedoraproject.org/rpms/vdo.git /var/lib/mock/f41-build-3156257-40677/root/chroot_tmpdir/scmroot/vdo
Cloning into '/var/lib/mock/f41-build-3156257-40677/root/chroot_tmpdir/scmroot/vdo'...
$ git fetch origin 1a7a1dfcb0f73de9e19e211fa48a1cb6cbcc3802:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdo
 * [new ref]         1a7a1dfcb0f73de9e19e211fa48a1cb6cbcc3802 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1a7a1df Update to 8.3.0.72 (rhbz#2319335)