$ git clone -n https://github.com/xcp-ng-rpms/lvm2.git /var/lib/mock/v8.3-u-pcoval2-11429-29742/root/chroot_tmpdir/scmroot/lvm2
Cloning into '/var/lib/mock/v8.3-u-pcoval2-11429-29742/root/chroot_tmpdir/scmroot/lvm2'...
$ git fetch origin 340a5c05a004f41dae936e5115dc708ea0614f2e:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/lvm2
 * [new ref]         340a5c05a004f41dae936e5115dc708ea0614f2e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 340a5c0 bump release for test build