$ git clone -n https://src.fedoraproject.org/rpms/gnome-nibbles.git /var/lib/mock/f45-build-11467-432/root/chroot_tmpdir/scmroot/gnome-nibbles
Cloning into '/var/lib/mock/f45-build-11467-432/root/chroot_tmpdir/scmroot/gnome-nibbles'...
$ git fetch origin 2c364c219e400ce4a48349ec220d6153280e162f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-nibbles
 * [new ref]         2c364c219e400ce4a48349ec220d6153280e162f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2c364c2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild