$ git clone -n https://src.fedoraproject.org/rpms/rubygem-crack.git /var/lib/mock/f39-build-1458140-33038/root/chroot_tmpdir/scmroot/rubygem-crack
Cloning into '/var/lib/mock/f39-build-1458140-33038/root/chroot_tmpdir/scmroot/rubygem-crack'...
$ git fetch origin e450227ef8d2d897cfc7a31d822cf7578aa8373b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-crack
 * [new ref]         e450227ef8d2d897cfc7a31d822cf7578aa8373b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e450227 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild