$ git clone -n https://src.fedoraproject.org/rpms/rubygem-gtksourceview2.git /var/lib/mock/f40-build-733958-105596/root/chroot_tmpdir/scmroot/rubygem-gtksourceview2
Cloning into '/var/lib/mock/f40-build-733958-105596/root/chroot_tmpdir/scmroot/rubygem-gtksourceview2'...
$ git fetch origin f54f566045c0e7366847dff9c2906da00a3ec7ba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-gtksourceview2
 * [new ref]         f54f566045c0e7366847dff9c2906da00a3ec7ba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f54f566 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild