$ git clone -n https://src.fedoraproject.org/rpms/lyx.git /var/lib/mock/f41-build-856817-167776/root/chroot_tmpdir/scmroot/lyx
Cloning into '/var/lib/mock/f41-build-856817-167776/root/chroot_tmpdir/scmroot/lyx'...
$ git fetch origin 4b9dc9106505214e554958b0603cfd7d51518a37:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lyx
 * [new ref]         4b9dc9106505214e554958b0603cfd7d51518a37 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b9dc91 Update to 2.4.2.1