$ git clone -n https://src.fedoraproject.org/rpms/bear.git /var/lib/mock/f39-build-2448845-61041/root/chroot_tmpdir/scmroot/bear
Cloning into '/var/lib/mock/f39-build-2448845-61041/root/chroot_tmpdir/scmroot/bear'...
$ git fetch origin 19b6d99e0530635b65aa40da969f20b625f05d0d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bear
 * [new ref]         19b6d99e0530635b65aa40da969f20b625f05d0d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 19b6d99 Update to 3.1.3 (close RHBZ#2235568)