$ git clone -n https://src.fedoraproject.org/rpms/whereami.git /var/lib/mock/f45-build-38355-723/root/chroot_tmpdir/scmroot/whereami
Cloning into '/var/lib/mock/f45-build-38355-723/root/chroot_tmpdir/scmroot/whereami'...
$ git fetch origin 35b2ee0c09bdd04582c0632d787c9234769d9e7f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/whereami
 * [new ref]         35b2ee0c09bdd04582c0632d787c9234769d9e7f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 35b2ee0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild