$ git clone -n https://src.fedoraproject.org/rpms/perl-Alien-wxWidgets.git /var/lib/mock/f45-build-21650-587/root/chroot_tmpdir/scmroot/perl-Alien-wxWidgets
Cloning into '/var/lib/mock/f45-build-21650-587/root/chroot_tmpdir/scmroot/perl-Alien-wxWidgets'...
$ git fetch origin 581feeff36d79d2b6b9a66610c22bd7e66d55275:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Alien-wxWidgets
 * [new ref]         581feeff36d79d2b6b9a66610c22bd7e66d55275 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 581feef Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild