$ git clone -n https://src.fedoraproject.org/rpms/sofia-sip.git /var/lib/mock/f45-build-36196-702/root/chroot_tmpdir/scmroot/sofia-sip
Cloning into '/var/lib/mock/f45-build-36196-702/root/chroot_tmpdir/scmroot/sofia-sip'...
$ git fetch origin 9f75adb0056b78a7855bad659bc3e3c5cdf8d555:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sofia-sip
 * [new ref]         9f75adb0056b78a7855bad659bc3e3c5cdf8d555 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9f75adb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild