$ git clone -n https://src.fedoraproject.org/rpms/vdirsyncer.git /var/lib/mock/f45-build-37930-718/root/chroot_tmpdir/scmroot/vdirsyncer
Cloning into '/var/lib/mock/f45-build-37930-718/root/chroot_tmpdir/scmroot/vdirsyncer'...
$ git fetch origin 195ab5d0cc7202f4287b4252f68a573c009f71de:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdirsyncer
 * [new ref]         195ab5d0cc7202f4287b4252f68a573c009f71de -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 195ab5d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild