$ git clone -n https://src.fedoraproject.org/rpms/python-jack-client.git /var/lib/mock/f45-build-31152-650/root/chroot_tmpdir/scmroot/python-jack-client
Cloning into '/var/lib/mock/f45-build-31152-650/root/chroot_tmpdir/scmroot/python-jack-client'...
$ git fetch origin 749204a6174930492a0af5214bcdc17c595019ce:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jack-client
 * [new ref]         749204a6174930492a0af5214bcdc17c595019ce -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 749204a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild