$ git clone -n https://src.fedoraproject.org/rpms/rubygem-ruby-shadow.git /var/lib/mock/f39-build-1461025-33239/root/chroot_tmpdir/scmroot/rubygem-ruby-shadow
Cloning into '/var/lib/mock/f39-build-1461025-33239/root/chroot_tmpdir/scmroot/rubygem-ruby-shadow'...
$ git fetch origin 2c2fbed8122d96182515cef77bc96fd548c6015a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-ruby-shadow
 * [new ref]         2c2fbed8122d96182515cef77bc96fd548c6015a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2c2fbed Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild