$ git clone -n https://src.fedoraproject.org/rpms/baresip.git /var/lib/mock/f39-build-2339804-59665/root/chroot_tmpdir/scmroot/baresip
Cloning into '/var/lib/mock/f39-build-2339804-59665/root/chroot_tmpdir/scmroot/baresip'...
$ git fetch origin 2ed9779fc82f095b5706b1a8069a03a07b4255e7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/baresip
 * [new ref]         2ed9779fc82f095b5706b1a8069a03a07b4255e7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2ed9779 Upgrade to 3.8.1 (#2256553)