$ git clone -n https://src.fedoraproject.org/rpms/usbguard.git /var/lib/mock/f39-build-1524193-36027/root/chroot_tmpdir/scmroot/usbguard
Cloning into '/var/lib/mock/f39-build-1524193-36027/root/chroot_tmpdir/scmroot/usbguard'...
$ git fetch origin b0c20efcc06c5f8ad94389b64e7ae576cdf46a96:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/usbguard
 * [new ref]         b0c20efcc06c5f8ad94389b64e7ae576cdf46a96 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b0c20ef Rebase to 1.1.2   Resolves: rhbz#2064543