$ git clone -n https://src.fedoraproject.org/rpms/fakeroot.git /var/lib/mock/f39-build-1918268-42933/root/chroot_tmpdir/scmroot/fakeroot
Cloning into '/var/lib/mock/f39-build-1918268-42933/root/chroot_tmpdir/scmroot/fakeroot'...
$ git fetch origin f961598b2460132af69b8c7c54a7841bd4aade47:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fakeroot
 * [new ref]         f961598b2460132af69b8c7c54a7841bd4aade47 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f961598 Update fakeroot to 1.32.1