$ git clone -n https://src.fedoraproject.org/rpms/R-RhpcBLASctl.git /var/lib/mock/f45-build-5897-345/root/chroot_tmpdir/scmroot/R-RhpcBLASctl
Cloning into '/var/lib/mock/f45-build-5897-345/root/chroot_tmpdir/scmroot/R-RhpcBLASctl'...
$ git fetch origin 39bf089e9ae39ac2990f971c6a31475bc4a62d64:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-RhpcBLASctl
 * [new ref]         39bf089e9ae39ac2990f971c6a31475bc4a62d64 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 39bf089 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild