$ git clone -n https://src.fedoraproject.org/rpms/playitagainsam.git /var/lib/mock/f45-build-28705-632/root/chroot_tmpdir/scmroot/playitagainsam
Cloning into '/var/lib/mock/f45-build-28705-632/root/chroot_tmpdir/scmroot/playitagainsam'...
$ git fetch origin 346b7f7a5eb3c73d0c6e009f8e3f89d45e2538f1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/playitagainsam
 * [new ref]         346b7f7a5eb3c73d0c6e009f8e3f89d45e2538f1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 346b7f7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild