$ git clone -n https://src.fedoraproject.org/rpms/python-jwcrypto.git /var/lib/mock/f40-build-2222709-52711/root/chroot_tmpdir/scmroot/python-jwcrypto
Cloning into '/var/lib/mock/f40-build-2222709-52711/root/chroot_tmpdir/scmroot/python-jwcrypto'...
$ git fetch origin b2dba81b054fa6c45f66a89f1a137478f7342491:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jwcrypto
 * [new ref]         b2dba81b054fa6c45f66a89f1a137478f7342491 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2dba81 Avoid python-deprecated dependency in RHEL builds