$ git clone -n https://src.fedoraproject.org/rpms/jmtpfs.git /var/lib/mock/f41-build-785997-13590/root/chroot_tmpdir/scmroot/jmtpfs
Cloning into '/var/lib/mock/f41-build-785997-13590/root/chroot_tmpdir/scmroot/jmtpfs'...
$ git fetch origin 8b30b71bca9a69227248bc13dd2f6cb16293f5e6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jmtpfs
 * [new ref]         8b30b71bca9a69227248bc13dd2f6cb16293f5e6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8b30b71 Eliminate use of obsolete %patchN syntax (#2283636)