$ git clone -n https://src.fedoraproject.org/rpms/mingw-gdb.git /var/lib/mock/f45-build-18449-516/root/chroot_tmpdir/scmroot/mingw-gdb
Cloning into '/var/lib/mock/f45-build-18449-516/root/chroot_tmpdir/scmroot/mingw-gdb'...
$ git fetch origin ca207d6eea3051084a3d483c29cec409adc0d31b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-gdb
 * [new ref]         ca207d6eea3051084a3d483c29cec409adc0d31b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ca207d6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild