$ git clone -n https://src.fedoraproject.org/rpms/isrcsubmit.git /var/lib/mock/f41-build-3153889-40629/root/chroot_tmpdir/scmroot/isrcsubmit
Cloning into '/var/lib/mock/f41-build-3153889-40629/root/chroot_tmpdir/scmroot/isrcsubmit'...
$ git fetch origin 45a7c0dd300063903d668631bc65a6e7eab72ed4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/isrcsubmit
 * [new ref]         45a7c0dd300063903d668631bc65a6e7eab72ed4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 45a7c0d convert GPLv3+ license to SPDX