$ git clone -n https://src.fedoraproject.org/rpms/libgusb.git /var/lib/mock/f39-build-1551149-36964/root/chroot_tmpdir/scmroot/libgusb
Cloning into '/var/lib/mock/f39-build-1551149-36964/root/chroot_tmpdir/scmroot/libgusb'...
$ git fetch origin bbfd09a2338af1472534a8eb894adb1d5bf0ea73:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libgusb
 * [new ref]         bbfd09a2338af1472534a8eb894adb1d5bf0ea73 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bbfd09a New release