$ git clone -n https://src.fedoraproject.org/rpms/R-credentials.git /var/lib/mock/f40-build-2032007-47660/root/chroot_tmpdir/scmroot/R-credentials
Cloning into '/var/lib/mock/f40-build-2032007-47660/root/chroot_tmpdir/scmroot/R-credentials'...
$ git fetch origin 787ba31408255a55682c5ab709cd3bcc8b5b6d4d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-credentials
 * [new ref]         787ba31408255a55682c5ab709cd3bcc8b5b6d4d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 787ba31 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild