$ git clone -n https://src.fedoraproject.org/rpms/rubygem-execjs.git /var/lib/mock/f40-build-2413286-60564/root/chroot_tmpdir/scmroot/rubygem-execjs
Cloning into '/var/lib/mock/f40-build-2413286-60564/root/chroot_tmpdir/scmroot/rubygem-execjs'...
$ git fetch origin 5db005424dece6ff0e7d365e1e22d99d6272ea81:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-execjs
 * [new ref]         5db005424dece6ff0e7d365e1e22d99d6272ea81 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5db0054 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild